The quad exhaust pipes are, indeed, cool. Very nice design. Look good, too. However.... there's been lotsa reports made about how they ain't even connected up to the pipes! What? JEEEZ! Like (see?) they're just some short tubes poking through the bumpers... an' that's all... and have nothing to do with the exaust system. Like... they're jus' for show... an' not for blow. Weird, huh? BUT... I have seen that Lexus refers to them, like (let'see?)... as as resonators. Or... a term like that. Like, like... they are not just the product of a short-changed idiot's design... and gypo construction... but serve to dynamically effect the sound quality of the V8 engine.
And that seems reasonable to me. Positioned as they are, how could they not have such an effect? And... that could be way cool, too. A nice expression of advanced design... and thinking. Nice touch. Truely.
SINCE the car has nothing obviously otherwise fake about it... i.e., Buick port-holes in the hood, for example... that don't actually do anything... it seems reasonable, to me, that the cool (albeit, detached) exauhst tips of the IS-F do actually have a planned-for genuine purpose. Eh?